US 12,106,724 B2
System and method for measuring ambient light
David Maucotel, Saint Cassien (FR)
Assigned to STMicroelectronics (Grenoble 2) SAS, Grenoble (FR)
Filed by STMicroelectronics (Grenoble 2) SAS, Grenoble (FR)
Filed on Oct. 23, 2023, as Appl. No. 18/492,066.
Application 18/492,066 is a continuation of application No. 16/850,327, filed on Apr. 16, 2020, granted, now 11,862,112.
Claims priority of application No. 1904558 (FR), filed on Apr. 30, 2019.
Prior Publication US 2024/0046889 A1, Feb. 8, 2024
Int. Cl. G09G 3/34 (2006.01); G09G 5/10 (2006.01); G01J 1/42 (2006.01)
CPC G09G 3/3406 (2013.01) [G09G 5/10 (2013.01); G01J 2001/4238 (2013.01); G09G 2320/0626 (2013.01); G09G 2360/144 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
a control circuit configured to provide a binary control signal alternating between a first binary state during first phases and a second binary state during second phases;
a screen controlled by the binary control signal, the screen being configured to emit light during each first phase, and not emit light during each second phase;
a light sensor configured to:
provide a first measurement signal after a plurality of consecutive measurements across a plurality of consecutive second phases, each consecutive measurement being a representative of a quantity of light received by the light sensor during each measurement phase, and
provide a second measurement signal representative of ambient light type; and
a processing unit configured to determine a setpoint signal based on the first measurement signal and the second measurement signal, the setpoint signal received by the control circuit to set a duration of the first binary state and the second binary state and to set an average target power based on the ambient light type.